Chromism in pink diamonds

By John Chapman - Rio Tinto Diamonds | 23.03.15
Chromism in pink diamonds

Pink diamonds from Argyle have been known by polishers, laboratories and traders to exhibit a phenomenon of photochromism whereby their colour can be influenced by illumination of different lights and intensities. These influences are relatively short-lived and most conspicuous after illumination by short wavelength light of high intensity. This effect is particularly noticeable when using instruments to observe fluorescence, such as a DiamondView, which after use with Argyle pink diamonds results in a distinctively bleached or pale colouration.

Intensification of the colour can be achieved by subjecting a pink diamond to elevated temperature –­ thermo-chromism, while the colour can also change unpredictably during polishing – a phenomenon known as tribo-chromism. All these possible changes are temporary and the colour can be readily returned to ...

Enter your details to read this article for free
All fields are required.
People who read this article, also read:
Research & Studies
The Next Era of Fancy Color Diamond Supply
Secondhand market takes the lead over mining  Over the last decade, traditional mining has failed to satisfy the market demand for exceptional Fancy Color Diamonds. At the same time, following the natural succession of generations, the pre-owned market for rare Fancy Color Diamonds seems to be taking the lead. The low volume of exotic, unearthed […]
FCRF Insights
A blocked Stone Report
A GIA report with a mixed format was sent to the FCRF by one of our members. We were asked to clarify this interesting grid, as the GIA doesn’t attach an explanation for these rarely seen reports.
FCRF Insights
Green Color in Diamonds: The Natural ‘Treatment’
Of all the fancy colours that diamonds can exhibit, green is the only one that can be naturally created once the diamond
x close

To continue reading this article

Or

Shopping Cart

You cart is empty

+
Apply for Membership

Become a part of our community and get unlimited access to all of our innovative Tools and Articles

The FCRF App is now available for
Download Button
Continue To Website